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A Serious And Concerning Issue, Maceió Is Sinking, The Alagoas Capital Faces An Alarming Situation, With A Subsidence Of 1.69 Meters In Just Five Days.
The Civil Defense Has Already Warned About The Risk Of Collapse In Maceió, Which Could Open A Sinkhole The Size Of Maracanã, Can You Imagine? The Most Affected Area Has Already Been Evacuated, And More Than 55,000 People Had To Leave Their Homes.
Many People Are Wondering: Why Is Maceió Sinking?
The Answer Lies In The Extraction Of Rock Salt, Let Me Explain It Clearly So You Can Understand. Down Below, About 1200 Meters Deep, Is Where The Rock Salt Is Located. The extraction Is Done By Injecting Water Into The Wells, Which Dissolves The Salt And Forms A Saline Solution. This Solution Is Removed, And The Process Continues In Other Wells.
There Is A Risk In This Method; When These Wells Connect, They Form A Large Underground Cavern. If There Aren’t Enough Support Pillars, A Collapse Can Occur. And That’s What’s Happening In Maceió. The Ground Is Reaccommodating, And This Can Happen Suddenly, Forming A Huge Sinkhole, Or Slowly And Continuously.
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The Current Situation
For Now, What We Are Seeing Is A Progressive Subsidence. But Technicians Are Aware That This Could Change And Turn Into An Abrupt Situation, Which Is Why They Evacuated The At-Risk Area. And Look, This Extraction Method May Be Cheaper, But It Has Its Safety Limits.
Maceió And The Challenge Of Rock Salt: Between Mineral Wealth And Environmental Risk
In Maceió, The Extraction Of Rock Salt, A Valuable Natural Resource, Has Proven To Be A Double-Edged Sword. On One Hand, The Activity Drives The Local And National Economy, Providing Essential Raw Material For Various Industries. On The Other Hand, The Dissolution Technique Used To Extract The Salt Has Caused A Real Geological Upheaval, With Risks Of Subsidence And Collapses.
The Dissolution Technique, While Cost-Effective, Has Proven To Be A Dangerous Dance With Nature. The Injection Of Water Into The Wells To Dissolve The Salt Creates Gigantic Caverns Underground. These Caverns, If Not Properly Managed, Can Lead To Serious Geological Instabilities. In Maceió, This Reality Has Already Knocked At The Door, With The Ground Collapsing Alarming.
The Dance Of Geological Layers
Imagine Layers Of Soil, Sand, And Rock As A Delicate Cake, Where Removing One Ingredient Can Upset The Entire Structure. In Maceió, The Extraction Of Rock Salt Is Doing Exactly That. The Upper Layers Are Reaccommodating, And This Movement Can Be Slow And Gradual Or Abrupt And Devastating.
Many Wonder Why The Filling Of The Wells Is Done With Sand Instead Of Stone; The Answer Lies In The Nature Of The Dissolution Process. Sand Allows For A More Homogeneous And Safe Filling Of The Cavities Created By The Extraction Of The Salt, While Stone Might Not Settle As Well, Increasing The Risk Of Instabilities.
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